Gaseous-fuel burner



e. A. HOFFMAN.

- GASEOUS FUEL BURNER.

APPLICATION FILED APR. 2,1921.

1,405,214. Patented Jan. 31,1922.

. 2 SHEETS-SHEET 1-- .ttuzl- I 4/ I I. I III. I III. I II I. III I; IIII I IIIIU I. I II IIII II G. A. HOFFMAN. GASEOUS FUEL BURNER-APPLICATION FILED APR. 2, 1921.

Witmwo GEORGE. A. HOFFMAN,

or MANsEIEnnbHIo;

"eAsEoUs-rUnn BURNER.

. r "Application filed' A ira T a whom'z'umag concemti Be it known thatI, GEORGE A..HOFEMAN, a citizen of the.United States, residing atMansfield, inthe county of Richland and State of Ohio,'have'inventedcertain newand useful Improvements in Gaseous Fuel Burners;and I do declare-the following to be a full, clear, andexactfdescri'ptionof the invention, such'as will enable others'skilledin the artto which it appertains' to make and j use the same. 7

My invention relateslto improvements to gaseous fuel burners fornumerous-uses and has more particular reference to' burnersoff the typeprovided witha plurality of closely associated slits through which thefuel discharges. The principal object of my inven tion is to provide animproved and greatly simplified construction, whereby the neces saryslits may be formedby spacinga plu} rality of metal strips apartwherevera flame is required, and securing said strips tightly togetherat the ends of the slits; In addition to manufacturingadvantage,a'buriier constructed In this manner will produce a much hotterblue-green 11211116811108 it pro- 7 vides for 'thorough mixing ofthevgaseous fuel with tion.

A further object of theinvention is to proair and more thorough comb-usvide a burner head of"novelf 'construction for ng the structure abovereceiving and holdi referred to.

lVith the foregoing in view, the invention resides in the novelconstruction and association of parts hereinafter described and claimed,the descriptive matter being sup;- plemented by the accompanyingdrawings.

Figure 1 is aside elevation of a burner constructed in accordancewiththe invention. Figure 2 is a top plan view, the several slits,however, being shown in diagram only.

Figure 3 is an end elevation. j

Figure 4 is a central vertical longitudina" sectional view as indicatedby line 44 of Figure2.

Figure 5 is a horizontal sectional view as designated by line 5-5 ofFigure 4.

Figure 6 is a vertical transverse sectional view as indicated by line 66of Fig. 4:.

Figure'fisa perspective'view of a portion of the burner head and thebent metal strips which are held thereby.

In the drawings above briefly described, I

have illustrated my inventionin connection 1921; seriaruo. 4525, 145.

' :Specificationbf LettersPatenti I ,Patented; 311., 31

' with a straightburner intended primarily for use in a gas heater, butit will be under"- stoodthat the novel featuresof construction ous otherrelations. V p I The numeral 1 designates a"pl'urality'of hereindisclosed may lie-employed innumer- 7, pairs of metal} strips which-aresecured to- .gether' at longitudinally spaced intervals as indicated at2, electric-welding being res erably employed for this: purpose althoughit isl'not essential; v

the strips-'1 are" bulged outwardly 1 indi- Between the points 2,

cated at 3, the-extentofitheb-ulgeincreasing gradually from thecenter'of t'he series of I strips to theouterinost ofth'ese' -By thusbulging the strips, pluralityof" fuel discharge slits'4 are providedandI have here shown these slits disposed intruly'par allel relation,although this is not absolutely essential. i

may be employed for holding-the'strips 1 and supplyinggaseou's fuelto'slits 4,1 pre' fer toc'onstrucit this headin themanner shown] Its'body portion'5 is formedlof' a single sheet of 'metalb'en't intosubstantially i a #5 While anypreferred formof bu-rner h'ea d the formof a tube with its free edge portions 6 disposedin approximatelyparallel relation and bent. alternately outwardly" and'inwardly asdesignatedat 7and 8-respectively,

whereby to snugly receive thebent' strips :1,

which str'ips' may be secures between the .r i

walls or edge portions 6 welding or in any -"otlier suitable way; A pairof preferably [flanged end plates 9 closethe ends of the body 5 and maywell carry brackets 10' by means of which the entire burner issupported, althoughit will of course be understood that othersupportingmeans could be used if desired.

Discharging into the lowerside ofthe burner head or body 5, I have showna suit able, type ofgas and air mixer llwhich 1s preferablyprovided-with one valve 12 to be I set according to the gas pressure andwith another valve 13 for turning the gas off and on as required. Toprevent the fuel from V the mixer 11, escaping only through theintermediate slits 4-; of the series without flowing to the ends oftheburner head and discharging equally through the several slits,

I mount a longitudinal partition'lt in the I burner head. The edges ofthis partition are provided with downturned flanges 15 electricallywelded or otherwise secured to the sides of the burner head. The ends ofsaid partition are notched as indicated at 16, and its intermediateportion is perforated atl7. The. notches 16 and the perforations 17'per-: mit the proper escape of fuel into the upper portion of the burnerhead so that it will be equally discharged through the several sets ofslits 4, thereby producing jets of equal height throughout the length ofthevburner. Furthermore, the partition is of advantage as a reinforcingmeans for the sheet metal head 5. a By employing the construction shownand described or an equivalent construction not only is a burnerprovided which may be easily ,and inexpensively manufactured, but actualtests have shown that by providingthe slits l, much more intimate mixingof the-gas and air takes place as it is burned, giving an extremely hotblue-green flame. While the details disclosed are adequate in connectionwith the form of burner Vindicatedyit is to'be understood that theimproved features may be embodied in connection with burners of pthershapes and for,

other purposes, without affecting the scope of the invention as claimed.1 I claim: V v t 1. burner comprising a plurality of pairs of metalstrips contacting with and secured against eachother at longitudinallyspaced points but bulged outwardly and sep arated from each otherbetween said points to provide a plurality of fuel outlet sneer holes,and a burner head carrying said strips, said slits being incommunication with said head. v I

A burner comprising a plurality of pairs ormetal strips contacting withand secured against each other at longitudinally spaced points,butbulged outwardly and separated from each other between said pointssecured against each other at longitudinally spaced points, but ibulgedoutwardly and separated from" each other between said points to providea plurality of fuel outlet slits or holes', a sheet of metal. bent intoap-.

proximately tubular shape with its edge por-.

tifons disposed in substantially parallel relation and rece vlng saidstrips therebetween, I

said edge portions being outwardly bulged'to receive the [outwardlybulged portions of saidstrips; and end plates forming with said sheet"of metal a burnerfhead;

4. A burner comprising a; plurality pairs of metal strips contactingwith and secured against each other at longitudinally spaced points,butbulged outwardly and S61):

arated from each other between said points to provide a plurality o ffuel outlet slits or holes, a sheet of metalbent intoiapproximatelytubular shape with its edge portions disposed in substantially parallelrelation and receiving said strips therebetween, said edge portionsbeing'outwardly bulged to receive the outwardlybulged portions of saidstrips, end plates formingw'ith said sheet r of metal a burner head, anda'perforate d partition secured longitudinally in said burner headbetween its fuelinlet andsaid outlet slits. r 1 y In testimony whereof Ihave hereunto set by hand. 1 r I GEORGE A. HOFFMAN.

Witnesses:

H. H, SANFORD,

B. R. YArI nNn'r.

